Drinking cup



FIG. 1 is a right front perspective view of a drinking cup showing our new design;

FIG. 2 is a left front view perspective thereof;

FIG. 3 is a left rear perspective view thereof;

FIG. 4 is a top perspective view thereof;

FIG. 5 is a right front perspective view of a drinking cup showing a second embodiment of our new design; and,

FIG. 6 is a left front perspective view thereof.

The broken lines in the second embodiment are included for the purpose of illustration and form no part of the claimed design. 

The ornamental design for a drinking cup, as shown and described. 